William O'Brien (Minnesota politician)

William O'Brien
11th Minnesota State Auditor
In office March 7, 1969 – January 4, 1971
Preceded by	Stafford King
Succeeded by	Rolland Hatfield
Member of the Minnesota House of Representatives for the 45th District
In office January 8, 1963 – January 2, 1967
Personal details
Born	February 19, 1930 Jacksonville, Florida
Died	June 25, 2007 Duluth, MN
Political party	Republican
Spouse(s)	Patty (divorced) Sandra
Children	Katherine, Alice, Julia, and Deborah (daughters); Elizabeth (stepdaughter)
Residence	Duluth, Minnesota
Alma mater	University of Minnesota
Profession	Investment Counselor

William J. "Bill" O'Brien (February 19, 1930 in Jacksonville, Florida – June 25, 2007) was a Minnesota Republican politician, who served as Minnesota State Auditor and a member of the Minnesota House of Representatives. O'Brien also unsuccessfully sought the office of Minnesota Secretary of State.

Born in Jacksonville, Florida, O'Brien moved to Minnesota in his youth. He graduated from St. Paul Academy, and went on to college at Cornell University, where he studied mechanical engineering. He returned to Minnesota to complete his education, earning a degree in finance. He later worked as an investment counselor.

O'Brien was elected to the Minnesota House of Representatives in 1962, and again in 1964. In 1969, he was appointed to the office of Minnesota State Auditor by Gov. Harold LeVander.

O'Brien had four daughters and one stepdaughter; he was married twice. He died in 2007.